The most scary thing about openning up a private Web 2.0 service such as Yahoo! Buzz? Simple! Aggressive marketers. We have seen it with MySpace, LinkedIn, and FaceBook. Now you can add Yahoo! Buzz to the list of online venues that will be targeted to generate millions of free visitors (or that’s what marketers will try to do). I personally like the fact that I get to try this good looking service as I don’t really have a site that can go against SI or ESPN, so having the chance to really test it out would be great. Don’t forget to get your codes here. Remember, this is not a marathon but a sprint. Whoever figures out how to effectively utilize Yahoo! Buzz will get the traffic advantage.